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- /*
- Copyright (c) 2016 James Ahlborn
-
- Licensed under the Apache License, Version 2.0 (the "License");
- you may not use this file except in compliance with the License.
- You may obtain a copy of the License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
- Unless required by applicable law or agreed to in writing, software
- distributed under the License is distributed on an "AS IS" BASIS,
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and
- limitations under the License.
- */
-
- package com.healthmarketscience.jackcess.impl.complex;
-
- import java.io.IOException;
- import java.util.ArrayList;
- import java.util.Iterator;
- import java.util.List;
- import java.util.NoSuchElementException;
-
- import com.healthmarketscience.jackcess.DataType;
- import com.healthmarketscience.jackcess.PropertyMap;
- import com.healthmarketscience.jackcess.impl.PropertyMapImpl;
-
- /**
- * PropertyMap implementation for multi-value, complex properties. The
- * properties for these columns seem to be dispersed between both the primary
- * column and the complex value column. The primary column only seems to have
- * the simple "multi-value" property and the rest seem to be on the complex
- * value column. This PropertyMap implementation combines them into one
- * synthetic map.
- *
- * @author James Ahlborn
- */
- public class MultiValueColumnPropertyMap implements PropertyMap
- {
- /** properties from the primary column */
- private final PropertyMap _primary;
- /** properties from the complex column */
- private final PropertyMap _complex;
-
- public MultiValueColumnPropertyMap(PropertyMap primary, PropertyMap complex)
- {
- _primary = primary;
- _complex = complex;
- }
-
- public String getName() {
- return _primary.getName();
- }
-
- public int getSize() {
- return _primary.getSize() + _complex.getSize();
- }
-
- public boolean isEmpty() {
- return _primary.isEmpty() && _complex.isEmpty();
- }
-
- public Property get(String name) {
- Property prop = _primary.get(name);
- if(prop != null) {
- return prop;
- }
- return _complex.get(name);
- }
-
- public Object getValue(String name) {
- return getValue(name, null);
- }
-
- public Object getValue(String name, Object defaultValue) {
- Property prop = get(name);
- return ((prop != null) ? prop.getValue() : defaultValue);
- }
-
- public Property put(String name, Object value) {
- return put(name, null, value, false);
- }
-
- public Property put(String name, DataType type, Object value) {
- return put(name, type, value, false);
- }
-
- public Property put(String name, DataType type, Object value, boolean isDdl) {
- // the only property which seems to go in the "primary" is the "multi
- // value" property
- if(isPrimaryKey(name)) {
- return _primary.put(name, DataType.BOOLEAN, value, true);
- }
- return _complex.put(name, type, value, isDdl);
- }
-
- public void putAll(Iterable<? extends Property> props) {
- if(props == null) {
- return;
- }
-
- for(Property prop : props) {
- if(isPrimaryKey(prop.getName())) {
- ((PropertyMapImpl)_primary).put(prop);
- } else {
- ((PropertyMapImpl)_complex).put(prop);
- }
- }
- }
-
- public Property remove(String name) {
- if(isPrimaryKey(name)) {
- return _primary.remove(name);
- }
- return _complex.remove(name);
- }
-
- public void save() throws IOException {
- _primary.save();
- _complex.save();
- }
-
- public Iterator<Property> iterator() {
- final List<Iterator<Property>> iters = new ArrayList<Iterator<Property>>(2);
- iters.add(_primary.iterator());
- iters.add(_complex.iterator());
-
- return new Iterator<Property>() {
- private Iterator<Property> _cur;
- private Property _next = findNext();
-
- private Property findNext() {
- while(!iters.isEmpty()) {
- _cur = iters.get(0);
- if(_cur.hasNext()) {
- return _cur.next();
- }
- iters.remove(0);
- _cur = null;
- }
- return null;
- }
-
- public boolean hasNext() {
- return (_next != null);
- }
-
- public Property next() {
- if(!hasNext()) {
- throw new NoSuchElementException();
- }
- Property prop = _next;
- _next = findNext();
- return prop;
- }
-
- public void remove() {
- if(_cur != null) {
- _cur.remove();
- _cur = null;
- }
- }
- };
- }
-
- @Override
- public String toString() {
- return PropertyMapImpl.toString(this);
- }
-
- private static boolean isPrimaryKey(String name) {
- // the multi-value key seems to be the only one on the primary column
- return ALLOW_MULTI_VALUE_PROP.equals(name);
- }
- }
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